Permanent mold for cast iron



' Aug. 25, 1925. 1,550,662

W. S. ANDERSCN PERMANENT MOLD FOR .CAST IRON Filed March 5, 1523 2 Sheets-$heet 1 F IG- II FIG-I WRL TE R HNDERS ON IN VEN TOR.

BY g y WTORNEY.

Aug. 25, 1925.

' W. S. ANDERSON PERMANENT MOLD FOR CAST IRON 2 Sheets-Sheet 2 Filed March 5, 1925 WALTER S- ANDERSON INVENTOR ATTORNEY.

Patented Aug. 25, 1925.

UNITED STATES PATENT OFFICE.

WALTER "S. ANDERSON, OF DETROIT, MICHIGAN, ASSIGNOR TO EARL HOLLEY, OF DETROIT, MICHIGAN.

PERMANENT MOLD FOR CAST IRON.

Application filed March 5, 1923.

To all whom it may concern:

Be it known that I, WALTER S. ANDERSON, a citizen of the United States, residing at 1602 Parkview Ave., Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Permanent Molds for Cast Iron, of which the following is a specification.

This invention relatesv to an improved permanent mold for cast iron. The object of this invention is to enable permanent molds in which iron is cast to completely fill with iron.

The difficulty heretofore experienced has been that with permanent iron molds having a cavity and a corresponding horizontal portion projecting into said cavity that the portion immediately above the horizontal portion would not immediately fill and the result was that there has been a failure to obtain complete filling of the molds. The reason for this difficulty is believed to be that the projecting portion cools the molten iron prematurely.

Figure I shows in elevation a mold of this t Y e.

Figure II shows a cross sectional elevation on such a mold taken on the plane X-Y.

Figure III shows another mold of similar t 3e.

Figure IV shows a cross section on the plane IVZ of Figure III.

In Figures I and II A is a hollow mold having a cavity therein. B is a corresponding hollow mold having a projecting horizontal portion C which enters the cavity of the mold A. The molds are adapted to match on the vertical plane UV. Vertical vents D, E, F and G are provided and corresponding grooves d, e, f and g are provided connecting the vents D, E, F and G to the interior of the cavity in the mold A. A sprue M and gate N are provided for the entrance of the iron into the matrix between the projecting mold B and the mold cavity in the mold A.

In Figures III and IV 0 is a hollow mold Serial No. 622,961.

having a mold cavity. P is a corresponding mold having a horizontal projecting portion Q. Three vents R, S and T are provided and corresponding grooves 1', s and 6 connect the vents R, S and T with the interior of the cavity in the mold O. A sprue H and gate J are provided for the entrance of the iron into the matrix between the cavity of. the mold O and the projecting portion of the mold P. The molds match together on the vertical plane 'KL.

Mode 0; opemt'ion.VVhen the iron flows in at H, in Figure III, it enters the matrix of the mold through the gate J, there is a tendency for the liquid iron to surge within the cavity and the grooves 1-, s, 25 act as a break and prevent the iron surging. They probably act also as vents, allowing any gas contained within the iron to escape through the vents R, S, and T, the result being that perfect castings are produced.

In Figures I and II the iron enters at M through the gate N and again the tendency for the iron to surge is set up which the grooves d, e, f and g effectively prevent. Again these moves probably also act as vents preventing any air being trapped above the horizontal projecting portion G of the mold B.

\Vhat I claim is:

1. In a pair of permanent molds adapted to match on a substantially vertical plane, a cavity in one mold and corresponding horizontal projecting portion in the other mold, a groove and vent on the surface of the mold cavity located in the upper portion of the said cavity.

2. In a pair of permanent molds adapted to match on a substantially vertical plane, a cavity in one mold and corresponding horizontal projecting portion in the other mold, a luralit of rooves and vents on the surface of the mold cavity located in the upper portion of the said cavity.

In testimony whereof I affix my signature.

WALTER S. ANDERSON. 

